mib updated this revision to Diff 450694.
mib marked 2 inline comments as done.
mib added a comment.
Address @kastiglione comment
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D131085/new/
https://reviews.llvm.org/D131085
Files:
lldb/examples/python/crashlog.py
lldb/examples/python/scripted_process/crashlog_scripted_process.py
Index: lldb/examples/python/scripted_process/crashlog_scripted_process.py
===================================================================
--- lldb/examples/python/scripted_process/crashlog_scripted_process.py
+++ lldb/examples/python/scripted_process/crashlog_scripted_process.py
@@ -10,10 +10,8 @@
class CrashLogScriptedProcess(ScriptedProcess):
def parse_crashlog(self):
- try:
- crash_log = CrashLogParser().parse(self.dbg, self.crashlog_path, False)
- except Exception as e:
- raise e
+ crashlog_parser = CrashLogParser(self.dbg, self.crashlog_path, False)
+ crash_log = crashlog_parser.parse()
self.pid = crash_log.process_id
self.addr_mask = crash_log.addr_mask
Index: lldb/examples/python/crashlog.py
===================================================================
--- lldb/examples/python/crashlog.py
+++ lldb/examples/python/crashlog.py
@@ -26,6 +26,7 @@
# PYTHONPATH=/path/to/LLDB.framework/Resources/Python ./crashlog.py ~/Library/Logs/DiagnosticReports/a.crash
#----------------------------------------------------------------------
+import abc
import concurrent.futures
import contextlib
import datetime
@@ -415,19 +416,44 @@
pass
class CrashLogParser:
- def parse(self, debugger, path, verbose):
+ "CrashLog parser base class and factory."
+
+ def __new__(cls, debugger, path, verbose):
+ # When `__new__` is overriden, if the returned type is the same
+ # as the class type, or related to it, the `__init__` method is
+ # automatically called after `__new__`. If the return type is not
+ # related, then the `__init__` method is not called.
+
+ # We don't need to propagate `__new__`'s aguments because both
+ # `JSONCrashLogParser` & `TextCrashLogParser` are sub-classes of
+ # `CrashLogParser`, so they will automagically be passed to the
+ # sub-class `__init__` method.
try:
- return JSONCrashLogParser(debugger, path, verbose).parse()
+ return JSONCrashLogParser.__new__(cls, debugger, path, verbose)
except CrashLogFormatException:
- return TextCrashLogParser(debugger, path, verbose).parse()
+ return object().__new__(TextCrashLogParser)
-
-class JSONCrashLogParser:
def __init__(self, debugger, path, verbose):
self.path = os.path.expanduser(path)
self.verbose = verbose
self.crashlog = CrashLog(debugger, self.path, self.verbose)
+ @abc.abstractmethod
+ def parse(self):
+ pass
+
+
+class JSONCrashLogParser(CrashLogParser):
+ def __new__(cls, debugger, path, verbose):
+ with open(path, 'r') as f:
+ buffer = f.read()
+ try:
+ self = object().__new__(JSONCrashLogParser)
+ self.data = self.parse_json(buffer)
+ return self
+ except:
+ raise CrashLogFormatException()
+
def parse_json(self, buffer):
try:
return json.loads(buffer)
@@ -438,14 +464,6 @@
return json.loads(tail)
def parse(self):
- with open(self.path, 'r') as f:
- buffer = f.read()
-
- try:
- self.data = self.parse_json(buffer)
- except:
- raise CrashLogFormatException()
-
try:
self.parse_process_info(self.data)
self.parse_images(self.data['usedImages'])
@@ -592,7 +610,7 @@
INSTRS = 5
-class TextCrashLogParser:
+class TextCrashLogParser(CrashLogParser):
parent_process_regex = re.compile('^Parent Process:\s*(.*)\[(\d+)\]')
thread_state_regex = re.compile('^Thread ([0-9]+) crashed with')
thread_instrs_regex = re.compile('^Thread ([0-9]+) instruction stream')
@@ -615,13 +633,10 @@
r'(/.*)' # img_path
)
-
def __init__(self, debugger, path, verbose):
- self.path = os.path.expanduser(path)
- self.verbose = verbose
+ super().__init__(debugger, path, verbose)
self.thread = None
self.app_specific_backtrace = False
- self.crashlog = CrashLog(debugger, self.path, self.verbose)
self.parse_mode = CrashLogParseMode.NORMAL
self.parsers = {
CrashLogParseMode.NORMAL : self.parse_normal,
@@ -1012,7 +1027,7 @@
if not os.path.exists(crashlog_path):
raise InteractiveCrashLogException("crashlog file %s does not exist" % crashlog_path)
- crashlog = CrashLogParser().parse(debugger, crashlog_path, False)
+ crashlog = CrashLogParser(debugger, crashlog_path, False).parse()
target = lldb.SBTarget()
# 1. Try to use the user-provided target
@@ -1257,7 +1272,7 @@
except InteractiveCrashLogException as e:
result.SetError(str(e))
else:
- crash_log = CrashLogParser().parse(debugger, crash_log_file, options.verbose)
+ crash_log = CrashLogParser(debugger, crash_log_file, options.verbose).parse()
SymbolicateCrashLog(crash_log, options)
if __name__ == '__main__':
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